Requirements of the support mechanics ILC / ILD TPC Requirements of the support mechanics Volker Prahl ILD Workshop 2013 Cracow 24.09.2013

Overview Fixing points and requirements of the TPC support structure Estimated acceleration and forces Various designs of the support structure Dimensions of the support structure of the TPC Flat ribbon support TPC cable, cooling, gas feed and routing HV Cable and routing TPC installation, mounting, tooling, support and working space Outlook

Fixing points of the TPC support structure Main dimensions of the TPC (outside) Ø Od = 3616, r=1808 Ø Id = 658, r=329 Length = 4700 incl. endplate and cabling Various possible fixing points Only the cryostat is foreseen to support the TPC

Estimated acceleration and forces Values of basic peak acceleration a0 [m/s2] North site A 0< 1.5 m/s² South site A 0< 1.0 m/s² For the proposed Japanese sides Please have a look at the talk from O. Ferreira, LLR Ecole Polytechnique http://ilcagenda.linearcollider.org/conferenceDisplay.py?confid=5524. TPC weight for calculation: 2000 kg >20000 N (Incl. FTD, SIT, Vertex) Seismic load force: 3000 N in x,y,z calculated with A 0< 1.5 m/s² The additional force load in longitudinal direction of the bar support should not be an issue. Question: Which maximal amplitude can be accepted ? An max. deflection of 1mm will be the aim

Various designs of the support structure Two options would be followed Flat ribbon support Support in Z necessary Bar support rectangular or double T-bar system Stiffness and damping in Z direction possible Pros and cons of the flat ribbon suspension + Thin and small cross section design possible - Support system ~ 1600mm long Damping support in Z necessary! This can be an issue? Pros and cons of the rectangular or double T-bar system + Damping in Z possible Large cross section Support system ~ 1600mm long Now this space is not available!

Dimensions of support structure Necessary area for adjustment Support bar cross sections of rectangular and double T-bar 200 HCAL junction plate HCAL Flat ribbon support 55 Sketch not in scale ! 30mm no go zone Endcap An cantilever design is only possible if minimum of 4 gaps can be used

Flat ribbon support Screws or rivets Necessary to move 55mm in Z ! Adjustable in x,y,z

Support in Z- direction ! Flat ribbon support Support in Z- direction ! Stiff U-bracket mounted on the TPC- Endplate Incl. a spring to damping the TPC in Z Ballpoint connection will push on an plate mounted on the ECAL surface

TPC cable, cooling, gas feed and routing TPC infrastructure needs to be defined Type of cable Number of cables Cross section and or diameter Specification of the cables Tubes for cooling Gas feed

HV Cable and routing Overview of an first idea of the HV-cable routing Inside or outside of the TPC vessel HV-Cable feed through at the Endplate Laying inside of the wall Connect to cathode Gap for the HV-cable od=20mm should be provide, the bending radius maybe an issue

HV Cable and routing Samples of HV-cables Okonite Hi-Voltage Cable: www.okonite.com 100kV, od= 16,76mm, bending radius = 4*od > 70mm Heinzinger HVC100 Best. No.:00.220.853.9 www.heinzinger.com 100kV, od= 14mm, bending radius min. 280mm! FUG C 2124, Mat.- No.: 0502032124 http://www.fug-elektronik.de/webdir/PDF/e/Access_data_sheet.pdf 100kV, od= 11,2mm, bending radius min. 152mm A Coated Stranded Copper Conductors B Polyester Insulation C Extruded Semiconducting Layer D Primary Insulation – Okoguard E Extruded Insulation Shield F Coated Copper Braid G Jacket – Okoseal  Cross section of the HV-cable: 255-300mm2 necessary

TPC installation, mounting, tooling, support and working space Basic questions has to be solved Installation of the inner detector (carbon fiber support tube) Independent assembly from the TPC necessary Installation steps of the TPC Central Electrode has to be mounted and connected with the HV-cable HV-Cable glued into the TPC or fixed at the vessel Patch panel necessary for the HV-cable Assembling steeps of the Endplate and the inner Vessel of the TPC Cabling and Cooling Alignment Combined sliding tool should be discussed it can be used for: Mounting of the central electrode TPC assembling and moving Installation of the central tube Something else Min 3 times longer as the TPC !

Conclusion and outlook Support system with min. 4 bars necessary Required space is an issue with the infrastructure and gaps between and in the middle of the HCAL / ECAL octagons Various cross sections and materials of the support bars are calculated Two support systems available Outlook Availability of space in the gaps has to be evaluated More FEA studies in progress (I-DEAS and/or Ansys) Minimize the cross section of the support bars depends on the requirements Space for the HV-Cable necessary, the place holder model will be prepared soon HV-cable bending radius can be an issue Field cage vessel studies should start